I am trying to make the move as seemless as possible.

I use the nameserver ns1.madcoland.com and ns2.madcoland.com for the servermatrix server. I want to change it so that the new server uses the nameserver ns1.madcoland.com and ns2.madcoland.com. When I try to add it it says it "Sorry, the nameserver ns1.madcoland.com already has the ip 70.85.110.130 assigned to it."

I dont want to change it at my registrar yet because then the websites would go down. I have tried to move the sites to the new server but whm will not let me unless I have the nameservers setup. What do I need to do so I can move make the move without downtime.

PartnerNOC

create a dns cluster between the two servers move all of your sites over when done change the ip's at your register wait for it to propagate enter A records for new ips (DNS) remove cluster
done
downtime 0